DhcpServerQueryAttributes

// DHCPSAPI.dll
#include <windows.h>

DWORD DhcpServerQueryAttributes(
    LPWSTR ServerIpAddr,   // optional
    DWORD dwReserved,
    DWORD dwAttribCount,
    DWORD* pDhcpAttribs,
    DHCP_ATTRIB_ARRAY** pDhcpAttribArr
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpServerQueryAttributes(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddr As String,   ' LPWSTR optional
    dwReserved As UInteger,   ' DWORD
    dwAttribCount As UInteger,   ' DWORD
    ByRef pDhcpAttribs As UInteger,   ' DWORD* in/out
    pDhcpAttribArr As IntPtr   ' DHCP_ATTRIB_ARRAY** in/out
) As UInteger
End Function

' ServerIpAddr : LPWSTR optional
' dwReserved : DWORD
' dwAttribCount : DWORD
' pDhcpAttribs : DWORD* in/out
' pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out
Declare PtrSafe Function DhcpServerQueryAttributes Lib "dhcpsapi" ( _
    ByVal ServerIpAddr As LongPtr, _
    ByVal dwReserved As Long, _
    ByVal dwAttribCount As Long, _
    ByRef pDhcpAttribs As Long, _
    ByVal pDhcpAttribArr As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DhcpServerQueryAttributes = ctypes.windll.dhcpsapi.DhcpServerQueryAttributes
DhcpServerQueryAttributes.restype = wintypes.DWORD
DhcpServerQueryAttributes.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddr : LPWSTR optional
    wintypes.DWORD,  # dwReserved : DWORD
    wintypes.DWORD,  # dwAttribCount : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pDhcpAttribs : DWORD* in/out
    ctypes.c_void_p,  # pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpServerQueryAttributes = Fiddle::Function.new(
  lib['DhcpServerQueryAttributes'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddr : LPWSTR optional
    -Fiddle::TYPE_INT,  # dwReserved : DWORD
    -Fiddle::TYPE_INT,  # dwAttribCount : DWORD
    Fiddle::TYPE_VOIDP,  # pDhcpAttribs : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpServerQueryAttributes(
        ServerIpAddr: *mut u16,  // LPWSTR optional
        dwReserved: u32,  // DWORD
        dwAttribCount: u32,  // DWORD
        pDhcpAttribs: *mut u32,  // DWORD* in/out
        pDhcpAttribArr: *mut *mut DHCP_ATTRIB_ARRAY  // DHCP_ATTRIB_ARRAY** in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpServerQueryAttributes([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddr, uint dwReserved, uint dwAttribCount, ref uint pDhcpAttribs, IntPtr pDhcpAttribArr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpServerQueryAttributes' -Namespace Win32 -PassThru
# $api::DhcpServerQueryAttributes(ServerIpAddr, dwReserved, dwAttribCount, pDhcpAttribs, pDhcpAttribArr)

#uselib "DHCPSAPI.dll"
#func global DhcpServerQueryAttributes "DhcpServerQueryAttributes" sptr, sptr, sptr, sptr, sptr
; DhcpServerQueryAttributes ServerIpAddr, dwReserved, dwAttribCount, varptr(pDhcpAttribs), varptr(pDhcpAttribArr)   ; 戻り値は stat
; ServerIpAddr : LPWSTR optional -> "sptr"
; dwReserved : DWORD -> "sptr"
; dwAttribCount : DWORD -> "sptr"
; pDhcpAttribs : DWORD* in/out -> "sptr"
; pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。

#uselib "DHCPSAPI.dll"
#cfunc global DhcpServerQueryAttributes "DhcpServerQueryAttributes" wstr, int, int, var, var
; res = DhcpServerQueryAttributes(ServerIpAddr, dwReserved, dwAttribCount, pDhcpAttribs, pDhcpAttribArr)
; ServerIpAddr : LPWSTR optional -> "wstr"
; dwReserved : DWORD -> "int"
; dwAttribCount : DWORD -> "int"
; pDhcpAttribs : DWORD* in/out -> "var"
; pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

; DWORD DhcpServerQueryAttributes(LPWSTR ServerIpAddr, DWORD dwReserved, DWORD dwAttribCount, DWORD* pDhcpAttribs, DHCP_ATTRIB_ARRAY** pDhcpAttribArr)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpServerQueryAttributes "DhcpServerQueryAttributes" wstr, int, int, var, var
; res = DhcpServerQueryAttributes(ServerIpAddr, dwReserved, dwAttribCount, pDhcpAttribs, pDhcpAttribArr)
; ServerIpAddr : LPWSTR optional -> "wstr"
; dwReserved : DWORD -> "int"
; dwAttribCount : DWORD -> "int"
; pDhcpAttribs : DWORD* in/out -> "var"
; pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out -> "var"
; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
	procDhcpServerQueryAttributes = dhcpsapi.NewProc("DhcpServerQueryAttributes")
)

// ServerIpAddr (LPWSTR optional), dwReserved (DWORD), dwAttribCount (DWORD), pDhcpAttribs (DWORD* in/out), pDhcpAttribArr (DHCP_ATTRIB_ARRAY** in/out)
r1, _, err := procDhcpServerQueryAttributes.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddr))),
	uintptr(dwReserved),
	uintptr(dwAttribCount),
	uintptr(pDhcpAttribs),
	uintptr(pDhcpAttribArr),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpServerQueryAttributes(
  ServerIpAddr: PWideChar;   // LPWSTR optional
  dwReserved: DWORD;   // DWORD
  dwAttribCount: DWORD;   // DWORD
  pDhcpAttribs: Pointer;   // DWORD* in/out
  pDhcpAttribArr: Pointer   // DHCP_ATTRIB_ARRAY** in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpServerQueryAttributes';

result := DllCall("DHCPSAPI\DhcpServerQueryAttributes"
    , "WStr", ServerIpAddr   ; LPWSTR optional
    , "UInt", dwReserved   ; DWORD
    , "UInt", dwAttribCount   ; DWORD
    , "Ptr", pDhcpAttribs   ; DWORD* in/out
    , "Ptr", pDhcpAttribArr   ; DHCP_ATTRIB_ARRAY** in/out
    , "UInt")   ; return: DWORD

●DhcpServerQueryAttributes(ServerIpAddr, dwReserved, dwAttribCount, pDhcpAttribs, pDhcpAttribArr) = DLL("DHCPSAPI.dll", "dword DhcpServerQueryAttributes(char*, dword, dword, void*, void*)")
# 呼び出し: DhcpServerQueryAttributes(ServerIpAddr, dwReserved, dwAttribCount, pDhcpAttribs, pDhcpAttribArr)
# ServerIpAddr : LPWSTR optional -> "char*"
# dwReserved : DWORD -> "dword"
# dwAttribCount : DWORD -> "dword"
# pDhcpAttribs : DWORD* in/out -> "void*"
# pDhcpAttribArr : DHCP_ATTRIB_ARRAY** in/out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。